Joseph e



(No Model.) JJB. HEBERT.

SEWING MAGHINE.

Patented Dec. 1.8, 18 83.

INVENTOR WITNESSES mm STATES.

PATENT OFFICE;

JOSEPH R. HEBERT, OF BROOKLYN, NEXV YORK.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 290,424, dated December 18, 1883.

Application filed July 30, 1883.

I0 all whom it may concern.-

Be it known that I, J osnrn R. Hnnnn'r, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

The invention relates to improvements in sewing-machines; and the object of my invention is to produce a four-motion feed from the cam on the main shaftthat is, to impart a regular forward, downward, backward, and upward motion to the fee'd-dogcarrying the goods from the operator.

The invention sought to be protected hereby will be more fully understood from the dc tailed description hereinafter presented, reference being had to the accompanying drawings, in which Figure 1 is an end View of an arrangement of devices embodying the elements of my invention. Fig. 2 is a plan view of same, and the remaining figures are detailed views,which will be understood from the reference-letters marked thereon.

In the drawings, A denotes the main driving-shaft of the machine; B, the double cam secured thereon and consisting of the parts a b,- O, the yoke; D, the vertical feed-lever,having an adjustable fulcrum, c, and E the horizontal feed-lever.

The main driving-shaft A is of the usual form and will be driven in the customary manner. The double cam B may be secured upon the driving-shaft by a screw, pin, or otherwise, and its construction is such that the greatest eccentricity of the parts a 11 project in opposite directions. The yoke O encompasses the cam B and has transverse bearing-surfaces d for the part (0 thereof, and vertical surfaces e,against which the part b has a sliding contact when the shaft is in motion.

It will be understood that the two parts of the cam have independent bearing-surfaces, the surfaces lettered d and 6, respectively being on different planes. By this arrangement of the cam and yoke I secure a four-motion feed which will carry the goods from the operator. The yoke 0 will preferably be a casting secured upon the upper end of the vertical feed-lever D, which has avertically-adj ust- (No model.)

able fulcrum, ca well-known element of the Hadley feed. The lower end of the vertical feed-lever D has a bearingaperture, f, in which is retained the ball 9 on the connectingscrew 71 and which aperture may be adjusted with relation to the said ball by the slot and screw i. The screw h has a slotted head and a threaded point, and its form and application to the vertical and horizontal levers are clearly shown in Figs. 2 and 5. The end of the horizontal feed-lever has an internally-threaded aperture to receive the threaded end of the screw h, as indicated, and the screw h has a shoulder, on, which bears against the end of the lever and renders the connection firm and secure.

It has usually been customary heretofore to form a ball directly upon the end of the horizontal feed-lever to form the proper bearing for the vertical lever; but this construction is defective, in that the breaking off or wearing down of the ball frequently necessitated the substitution of an entire new horizontal lever. WVhen the driving-shaft Ais set in motion,the double cam B will be correspondingly rotated, and during its rotation the part (6 thereof will act alternately against the bearing-surfaces d of the yoke G, and impart to the same and the vertical and horizontal feed-levers a vertical reciprocating motion, while the part b of the cam B, coming in alternate contact with its bearing-surfaces e, actuates the said feed-levers between their elevation and depression aforesaid laterally-that is, it gives them a forward and backward motion. It is plain, therefore, that I secure a positive four-motion feed from the cam on the driving-shaft; andI desire it understood that the details of construction may be varied at will, the same result being secured without departing from the spirit of my claim.

While the centers of the parts a and b of the cam B are herein shown as being arranged diametrically opposite to each other, it will be understood that the relative positions of these parts of the said cam may be varied above referred to should not, however, exceed a few degrees, so that the centers of the working-faces of the oppositely-arranged parts of the said cam B will always be in opposite quadrants of a circle of which the axis of the driving-shaft G is the center. The term opposite wherever used in this specification,in connection with the parts a and b of the cam B, will therefore be understood to mean diametrically opposite, or approximately so, thus confining the arrangement of the parts of the said cam to opposite quadrants of a circle, in eontradistinction to such an arrangement of the parts of the feed-cam as has long been used in the well-known Singer machine, in which the centers of the working-faces of the two parts of the feed-cam are in adjacent quadrants, or possibly even within the same quadrant.

Vhat I claim as myinvention, and desire to secure by Letters Patent, is

1. In a sewing-machine, the combination, with. the main or driving shaft, of a double cam consisting of two portions arranged to r0- tate in different planes, the working faces or parts of greatest eccentricity of the said por tions projecting in opposite directions on opposite sides of the said driving-shaft, a vertical feed-lever having a yoke composed of vertical and transverse bearings for said double cam, and a horizontal feed-lever loosely c011- neeted to said vertical lever, whereby four positive motions in different planes may be imparted to the feed-bar, substantially as described.

2. In a sewing-machine, the combination, with the main or driving-shaft, of a double cam, the two parts of which are arranged to rotate in different vertical planes, said parts having their working faces or portions of greatest eccentricity on opposite sides of the said driving-shaft,- avertieal feed-lever having a yoke composed of vertical and transverse bearing-surfaces for said double cam, an adjustable fulcrum for said vertical feed-lever, and a horizontal feed-lever loosely connected with said vertical lever, substantially as described.

3. The combination, with the driving-shaft A, of the double cam 13, consisting of the parts a and 1), arranged on opposite sides of the said driving-shaft, the vertical feed-lever D, having the bearing-aperture fat its lower end and the yoke C at its upper end, said yoke consisting of the vertical bearings e and the trans verse bearings d, the adjustable fulcrum e, and the horizontal feed-lever E, provided with the shouldered ball-headed screw h, substantially as described.

Signed at New York, in the county of New York and State of New York, this 26th day of July, A. D. 1883.

JOSEPH R. HEBERT.

\Vitnesses:

Or-rxs. C. GILL, HERMAN Gus'row. 

